Premieres Wednesday, April 26, 2023 at 8 p.m. on KPBS TV / PBS App + Encores Sunday, April 30 at 3 p.m. on KPBS TV and 8 p.m. on KPBS 2. The year is 2013, in the waters of Belize and Guatemala. A desperate fisherman guns his small boat into the open ocean in search of fish. With engine trouble, the fisherman peers over the side of his boat. Below is an uncharted, massive crown of rocks and corals, teeming with life. The discovery marks a new chapter in understanding corals and fish that need each other and in saving reefs globally.